Hyperdry technology keeps the main tube dry by ejecting water through an independent escape channel. This easy system uses the tilt of the snorkel pipe and the resilience of water. 3-D curve for optimal angle and performance. Othro-conscious mouthpiece for ultimate comfort and reduced jaw fatigue. high flow channel and purge valve. Detachable two piece swivel adaptor to maximize comfort. Not returnable once opened due to hygiene issues.